July 30

Caliph al-Mansur formally lays the foundation for the city of Baghdad, which becomes the capital of the Abbasid Caliphate.

The Abbasid Caliph al-Mansur selected a site along the Tigris River for a new capital city, designed in a distinctive circular plan and intended to serve as a center of Islamic learning and governance. Baghdad grew rapidly into one of the largest and most culturally significant cities in the medieval world.

Radical Hussites storm Prague's New Town Hall and throw several officials from the windows in the First Defenestration of Prague.

Radical followers of the executed reformer Jan Hus stormed Prague's New Town Hall and threw several town councilors from the windows to their deaths below, an act of political violence that helped ignite the prolonged and destructive Hussite Wars against the Catholic establishment.

Christopher Columbus arrives at the mainland of Central America during his fourth and final voyage to the New World.

During his fourth and final voyage to the New World, an aging and increasingly ill Christopher Columbus reached the coast of present-day Honduras, marking his first actual contact with the American mainland after his earlier voyages had focused primarily on exploring Caribbean islands and their surrounding waters.

The Virginia General Assembly convenes at Jamestown, the first elected representative legislative body in the Americas.

Established under a charter from the Virginia Company, an English trading enterprise, the assembly brought together the colonial governor, his council, and elected burgesses from each settlement to make laws for the colony. Though its authority was limited by English oversight, the gathering set an important precedent for representative government that later influenced colonial and American political institutions.

Scottish Covenanter forces under the Earl of Leven begin the siege of Hereford, one of the remaining Royalist strongholds in the English Civil War.

The Covenanters, allied with the English Parliamentarians under the terms of the Solemn League and Covenant, sought to capture the city to weaken Royalist control of the west of England. The siege proved unsuccessful and was abandoned after several weeks, but it reflected the close military cooperation between Scottish and English forces against King Charles I during the civil wars.

The city of Baltimore, Maryland, is founded.

English colonists, including prominent leaders such as Cecil Calvert, established a settlement along the Patapsco River in the Province of Maryland that developed into the city of Baltimore, which grew into a major American port and industrial center in the centuries that followed.

Uruguay defeats Argentina to win the first FIFA World Cup, held on home soil in Montevideo.

Hosting the first-ever FIFA World Cup on home soil, Uruguay defeated rival Argentina 4-2 in the final match played before an enthusiastic crowd in Montevideo, securing the inaugural title. The tournament's success established the World Cup as a major recurring event in international sport for decades to come.

Uruguay wins the first FIFA World Cup, defeating Argentina in the final in Montevideo.

The inaugural tournament was held in Uruguay partly to mark the centenary of its independence, and the host nation triumphed 4-2 in front of a passionate home crowd. Several European teams, including England, declined to travel for the competition due to the long sea voyage, but the event laid the foundation for what would become the world's most-watched sporting tournament.

The Summer Olympic Games open in Los Angeles.

The Summer Olympic Games opened in Los Angeles amid the difficult economic backdrop of the Great Depression, with organizers introducing several lasting innovations, including the first purpose-built Olympic Village to house competing athletes, despite significantly reduced international participation caused by the high costs of travel during the crisis.

The U.S. Congress passes legislation adding "In God We Trust" as the nation's official motto.

The United States Congress passed legislation formally establishing "In God We Trust" as the country's official national motto, supplementing its earlier unofficial use on currency and coinage. The move reflected Cold War-era efforts to religiously and ideologically distinguish the United States from officially atheist communist adversaries abroad.

England defeats West Germany 4-2 to win its only FIFA World Cup title, at Wembley Stadium in London.

Playing before a home crowd at Wembley Stadium, England defeated West Germany 4-2 in extra time to win its only FIFA World Cup title to date, with striker Geoff Hurst scoring a hat-trick in the final, a feat still unmatched in World Cup final history.

England defeats West Germany 4-2 after extra time to win the FIFA World Cup at Wembley Stadium.

The victory, achieved with a controversial hat-trick from Geoff Hurst including a disputed goal that may not have fully crossed the line, remains England's only men's World Cup triumph. Captain Bobby Moore lifted the Jules Rimet Trophy before a home crowd, and the match is still widely regarded as the greatest moment in English football history.

Apollo 15 astronauts David Scott and James Irwin land on the Moon, beginning the mission's extended lunar surface exploration.

Apollo 15 astronauts David Scott and James Irwin successfully landed their lunar module in the Hadley-Apennine region of the Moon, beginning a mission notable for its extended surface stay and the first use of a Lunar Roving Vehicle to explore terrain farther from the landing site than any previous mission.

Apollo 15 astronauts David Scott and James Irwin land on the Moon, using the first Lunar Roving Vehicle.

The mission marked a new phase of lunar exploration, with the battery-powered rover allowing the astronauts to travel far greater distances across the surface than earlier missions had permitted on foot. Over three days, Scott and Irwin explored the Hadley-Apennine region, collecting geological samples that included some of the oldest rocks ever returned from the Moon.

Union leader Jimmy Hoffa disappears from a restaurant parking lot in Bloomfield Hills, Michigan, never to be found.

Hoffa, the former president of the Teamsters union with well-documented ties to organised crime, had gone to meet reputed mob figures shortly before vanishing. Despite decades of investigation, searches, and numerous theories, his body has never been recovered, and his disappearance remains one of the most enduring unsolved mysteries in American criminal history.

Vanuatu gains independence, ending nearly a century of joint British-French colonial administration.

The Pacific archipelago had been governed since 1906 as an unusual Anglo-French Condominium, informally nicknamed the 'Pandemonium' for its dual, often contradictory administrative and legal systems. Independence followed years of growing local political movements, and Vanuatu emerged as a sovereign nation while retaining ties to both former colonial powers through language and institutions.

Ian Gow, a Conservative Member of Parliament, is assassinated by the Provisional IRA in a car bomb attack at his home in East Sussex.

Gow, a close ally of Prime Minister Margaret Thatcher and a vocal opponent of the Anglo-Irish Agreement, was killed instantly when a bomb planted under his car exploded as he prepared to leave for Parliament. His murder was one of a series of high-profile IRA attacks on British political figures during the Troubles.

The last original Volkswagen Beetle rolls off the assembly line in Puebla, Mexico, ending 65 years of production.

After sixty-five years of continuous production across multiple countries, the last original-style Volkswagen Beetle rolled off the assembly line at a factory in Puebla, Mexico, marking the end of an era for one of the best-selling and most iconic automobile designs in history.

Top of the Pops, the world's longest-running weekly music chart show, is broadcast for the final time on BBC Two.

The programme had aired continuously on the BBC since 1964, showcasing performances from the biggest acts in pop music and shaping British popular culture for over four decades. Declining viewing figures amid the rise of music television channels and the internet led to the decision to end the show, though repeats and specials continued to air occasionally afterward.

Zara Phillips, granddaughter of Queen Elizabeth II, marries former rugby union player Mike Tindall in Edinburgh.

The wedding at Canongate Kirk in Edinburgh drew members of the extended royal family and large crowds along the Royal Mile. Zara, the daughter of Princess Anne, was already an accomplished equestrian who would go on to compete at the London 2012 Olympics, while Tindall, an England rugby international, had been part of the squad that won the 2003 Rugby World Cup.